As an operator at a water treatment plant, what could you do in order to maintain a chlorine residual if there is a significant variation in water temperature over the year?

1. As an operator at a water treatment plant, what could you do in order to
maintain a chlorine residual if there is a significant variation in water
temperature over the year? (2 marks)
2. Is the impact of temperature variability more likely to impact treatment plants
that use groundwater or surface water as source water? Explain in your own
words? (2 marks)
3. Is chlorine a more effective disinfectant in warm water or in cold water?
Explain the basics of temperature? . (4 marks)